Last reviewed · How we verify

Suvorexant tablets, over-encapsulated

Eisai Inc. · Phase 1 active Small molecule ✓ Verified May 2026 Quality 0/100

Suvorexant tablets, over-encapsulated is a Small molecule drug developed by Eisai Inc.. It is currently in Phase 1 development. Also known as: BELSOMRA.

Suvorexant tablets are a medication used to treat insomnia disorders. They work by blocking the activity of orexin, a neurotransmitter involved in regulating sleep and wakefulness, as indicated by their mechanism of action in ChEMBL.

Likelihood of approval
9.6% vs 9.6% industry baseline
If approved by FDA: likely 2033–2036
Steps remaining: Phase 2 → Phase 3 → NDA/BLA submission
Confidence: Medium
Why this estimate
  • Baseline phase 1 → approval rate +9.6pp
    Industry-wide phase 1 drugs reach approval ~9.6% of the time (BIO/Informa 2023 industry benchmark across all therapeutic areas).
Predicted approval windows by jurisdiction (conditional on FDA approval)
Regulator Country Likely year Lag vs FDA
FDA US 2033–2036
EMA EU 2034–2037 +0.7 yr
MHRA GB 2034–2037 +0.7 yr
Health Canada CA 2034–2038 +0.9 yr
TGA AU 2034–2038 +1.2 yr
PMDA JP 2034–2038 +1.5 yr
NMPA CN 2035–2039 +2.3 yr
MFDS KR 2034–2038 +1.4 yr
CDSCO IN 2034–2039 +1.8 yr
ANVISA BR 2035–2039 +2.3 yr

Hover any row for the lag rationale. Lag estimates are reduced when the drug has FDA Breakthrough or EMA PRIME designation (sponsors file globally in parallel).

Estimate based on the BIO/Informa industry phase transition rates plus per-drug modifiers for therapeutic area, sponsor type, FDA designations, mechanism, and trial design. Per-jurisdiction lags from Tufts CSDD international approval studies. Not investment, clinical or regulatory advice. Methodology: /methodology#likelihood.

At a glance

Generic nameSuvorexant tablets, over-encapsulated
Also known asBELSOMRA
SponsorEisai Inc.
ModalitySmall molecule
PhasePhase 1

Approved indications

No approved indications tracked.

Common side effects

No common side effects on file.

Key clinical trials

Primary sources

Every claim on this page is sourced from regulatory or scientific primary sources. See our editorial policy for full methodology.

SourceUsed for
ClinicalTrials.govTrial enrolment, design, endpoints, results

Competitive intelligence

For the full competitive landscape — auto-detected comparators, recent regulatory actions across the set, upcoming PDUFA, patent timeline, sponsor landscape:

Frequently asked questions about Suvorexant tablets, over-encapsulated

What is Suvorexant tablets, over-encapsulated?

Suvorexant tablets, over-encapsulated is a Small molecule drug developed by Eisai Inc..

Who makes Suvorexant tablets, over-encapsulated?

Suvorexant tablets, over-encapsulated is developed by Eisai Inc. (see full Eisai Inc. pipeline at /company/eisai).

Is Suvorexant tablets, over-encapsulated also known as anything else?

Suvorexant tablets, over-encapsulated is also known as BELSOMRA.

What development phase is Suvorexant tablets, over-encapsulated in?

Suvorexant tablets, over-encapsulated is in Phase 1.

Related

Primary sources · FDA · ClinicalTrials.gov · EMA · SEC EDGAR · ChEMBL · Wikidata · full sourcing